NJW4305 PWM 3-PHASE DC BRUSHLESS MOTOR CONTROLLER ■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE The NJW4305 is a 3-phase brushless DC motor controller with PWM control. It uses hall element signal inputs and generates motor driving waveform. Output pre-driver is optimized to work with external power MOS transistors for better power handling. Using the NJW4305, 3-phase DC motor application with speed control feature can be easily achieved. NJW4305XVC3/T ■ BLOCK DIAGLAM VCC ■ FEATURE ▪ Supply Voltage ▪ Quiescent Current ▪ PWM Pre-Driver ▪ Direct PWM Control Circuit ▪ Operating Temperature ▪ Protection Circuit ▪ FG Output ▪ Forward / Reverse Direction ▪ Package : 7.0V ~ 38V : 4.1mA typ. : 100mA : -40ºC ~ +105ºC ( T Series ） : ILIMIT, UVLO, TSD, LD VREF UH TSD H1+ H1H2+ H2H3+ H3- VH + - WH + - Rotor Position Decode UL + - : SSOP-20-C3 ■ FUNCTION LINEUP NJW4305A NJW4305B ( PLN ) NJW4305C ( PLN ) NJW4305D ( PLN ) UVLO VL FR : : : : FR Function Vref（for HB） BR Function FR+Vref+BR+Small PKG OSC VERR Dead Time Saw Oscillator WL Local Oscillator PWM Logic + - + - ILIMIT FG Lock Detect GND Ct Ver.2010/09/03